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MAZDA

01-013-22

Manufacturer communications

Publication date
2022-10-19
Received by NHTSA
2022-11-04
NHTSA record numbers
10225776

Manufacturer summary

Original wording in English

Some customers may experience the CHECK ENGINE light ON with DTC P0126:00 (Thermostat stuck open) and one or more of the following symptoms: * The engine takes longer to warm up * The engine temperature gauge fluctuates * The low coolant temperature indicator (blue) light stays on longer or comes on while driving * Poor heater performance, especially at idle NOTE: * Vehicles with SKYACTIV-G 2.5T are not applicable. * If DTC P2B61:00 (Coolant control valve circuit range/performance) accompanies, this information is not applicable. Diagnose according to the instructions in MGSS. Due to production variety of the failsafe thermostat integrated in the coolant control valve, engine coolant may enter into a dry hollow in the failsafe thermostat, resulting in unintended opening of the failsafe thermostat at lower temperatures (104-176 °F (40-80 °C)). To eliminate this concern, the production process of the coolant control valve has been modified.

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Reported code forms

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

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MakeModelModel year
MazdaCX-32021
MazdaCX-32020
MazdaCX-32019
MazdaCX-302021
MazdaCX-302020
MazdaCX-52021
MazdaCX-52020
MazdaCX-52019
MazdaCX-52018
MazdaMAZDA32021
MazdaMAZDA32020
MazdaMAZDA32019
MazdaMAZDA62021
MazdaMAZDA62020
MazdaMAZDA62019
MazdaMAZDA62018

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